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6 votes

Threema: Are received messages exposed, when sender's private key gets compromised?

For a Diffie-Hellman key exchange the shared secret created will be the same if the same key pairs are used. This means that if Eve gets hold of a private key of either sender or receiver then they ...
AlphaD's user avatar
  • 923
5 votes
Accepted

Threema: Are received messages exposed, when sender's private key gets compromised?

Question #1: With Bob's key and the traffic, could Eve now decrypt all content Bob has ever sent to Alice? Yes. It is about "forward secrecy" and it depends on how Threema manages session keys. (...
Alexander Fadeev's user avatar
2 votes

Is it secure to make my Threema ID public?

As INV3NT3D has already explained, publicly sharing your Threema ID is totally fine. However, you should not share your ID's QR code. If someone scans it, your verification level on their device will ...
molodovan's user avatar
2 votes

Is it secure to make my Threema ID public?

Nope, you should be just fine sharing your Threema-ID. The reason being that your communication is protected with end to end encryption. Strength of the encryption: The asymmetric ECC based ...
INV3NT3D's user avatar
  • 3,997
2 votes

Is it secure to make my Threema ID public?

Classic example of security vs privacy. If all you care about is security, sharing your ThreemaID on your facebook, instagram, etc. social media presence(s) is no big deal. If you are using Threema ...
Gungnir's user avatar
  • 21
1 vote

Is it secure to make my Threema ID public?

I think sharing your Threema ID is as good or bad as sharing your phone number or E-Mail address: Anybody who has it can call you (i.e.: send a Threema message to you). You'll have to decide what to ...
U. Windl's user avatar
  • 193
1 vote
Accepted

Is it secure to make my Threema ID public?

They now even suggest sharing your ID via their "share link" feature. From their post about this: https://threema.ch/en/blog/posts/share-link-en To streamline the process of adding contacts to ...
Marcel's user avatar
  • 4,084

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